### Parallel to the ground and the ball is moving upward

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Q1. A hotel elevator ascends 170 m with a maximum speed of 5.9 m/s. Its acceleration and deceleration both have the magnitude of 1.5 m/s2.

Q2. A 100 {rm g} ball on a 60 {rm cm} long string is swung in a vertical circle whose center is 200 {rm cm} above the floor. The string suddenly breaks as it is parallel to the ground and the ball is moving upward. The ball reaches a height 800 {rm cm} above the floor.

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